Although described as regular dies trial pieces in the literature, this is actually a backdated fantasy piece made to complete off-metal sets of this year which included the quarter, half and dollar with the motto "In God We Trust" used on regular coinage from 1866 to 1891. For more on that click, here.
The obverse die was from a hub with a broken first S in STATES and reverse die was used from 1869 to the mid-1870s on die trials with a scratch above the 'NE' in ONE.
Examples are known as follows:
Copper J333/P405 with about a half dozen known.
Aluminum J334/P406 with about 4 known.
Photo courtesy of Heritage.